Dice Roller
Enter standard notation: 3d6, 2d20+5, 4d10-2. Press Roll.
Result
Total
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Min roll
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Max roll
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Average
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Modifier
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Dice notation
Tabletop standard: NdM means roll an M-sided die N times. Add or subtract a flat modifier with +X or -X.
- 1d20 — one 20-sided die (D&D attack roll).
- 3d6 — three 6-sided dice (classic ability scores: 3–18 range).
- 2d20+5 — two d20s plus a +5 bonus (advantage roll with skill).
How random is it?
Uses crypto.getRandomValues with rejection sampling to avoid modulo bias. Indistinguishable from physical dice for any tabletop application; not suitable for cryptographic key generation (use a real RNG library for that).